removed support for so called child objects from Space (this was an old feature of Space struct, now not needed)

Space::get_object_field(...) renamed to Space::get_space(...)

src/mainoptions/mainoptionsparser.cpp

@@ -346,7 +346,7 @@ void MainOptionsParser::parse_non_option_arguments(size_t argc, const char ** ar
 
 void MainOptionsParser::add_option_to_space(const std::wstring & option, const std::vector<std::wstring> & arguments)
 {
-	Space * option_table = space->get_object_field(option);
+	Space * option_table = space->get_space(option);
 
 	if( !option_table )
 	{